<template>
    <van-nav-bar
  title="官方客服"
  left-arrow
  @click-left="onClickLeft"
  :border="false"
/>
</template>
<script setup lang="ts">
    const onClickLeft = () => history.back();
</script>
<style >
    .van-icon-arrow-left:before {
  color: gray;
}
</style>